<template>
  <div id="detailNavBar">
    <nav-bar>
      <div slot="left" class="back" @click="backClick">
        <img src="~assets/img/common/back.svg">
      </div>
      <div slot="center" class="title">
        <div v-for="(item, index) in titles" :key="item" class="title-item" 
         :class="{active: index === currentIndex}" @click="titleClick(index)">
          {{item}}
        </div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
//导入模板
import NavBar from "components/common/navbar/NavBar"; //头部

export default {
  name: "detailNavBar",
  data() {
    return {
      titles : ["商品","参数","评论","推荐"],
      currentIndex: 0
    }
  },
  components: {
    NavBar
  },
  methods: {
    titleClick(index) {
      this.currentIndex = index
      //向父组件传递
      this.$emit('titleClick',index)
    },
    backClick() {
      //返回上一页
      this.$router.back()
    }
  }
}
</script>

<style scoped>
.title {
  display: flex;
  font-size: 13px;
}
.title-item {
  flex: 1;
}
.active {
  color: var(--color-high-text);
  /* color: red; */
}
.back img {
  margin-top: 12px;
}
</style>
